<!DOCTYPE html>
<html>
<head lang="en">
  <meta charset="UTF-8">
  <title> 模仿ajax .html</title>
</head>
<body>

<script type="text/javascript">
  window.onload = function(){
    var myDate = new Date();
    document.getElementById('currentTime').innerText = myDate.getTime();
  };

  function LoadPage(){
    var targetUrl =  document.getElementById('url').value;
    console.log(targetUrl);
    document.getElementById("iframePosition").src = targetUrl;
  }

</script>

<div>
  <p>请输入要加载的地址：<span id="currentTime"></span></p>
  <p>
    <input id="url" type="text" value="https://www.bilibili.com/"/>
    <input type="button" value="提交" onclick="LoadPage()">
  </p>
</div>

<div>
  <h3>加载页面位置：</h3>
  <iframe id="iframePosition" style="width: 100%;height: 500px;"></iframe>
</div>

</body>
</html>